# Exam 1 - CHM 2046 Gower/Mitchell Sections Exam 1(Form Code A Spring 2010 Instructions On your scantron sheet enter and bubble in your name UF ID

This preview shows pages 1–2. Sign up to view the full content.

CHM 2046 Gower/Mitchell Sections Exam 1 (Form Code A) Spring 2010 Instructions: On your scantron sheet enter and bubble in your name , UF ID number (start on the leftmost space and leave any extra spaces blank), and Form Code (see above). Bubbling errors will not be negotiated . Notes and Potentially Useful Data : The double-arrow symbol used in this exam ( ↔) refers to a reversible reaction K w = 1.0 x 10 –14 R = 0.0821 lit•atm/mol•K 1. At a particular temperature, K c = 1.6 x 10 –2 for 2H 2 S(g) 2H 2 (g) + S 2 (g). Calculate the K c at the same temperature for the following reaction: ½ S 2 (g) + H 2 (g) H 2 S(g). (1) 7.9 (2) 62.5 (3) 0.13 (4) 1.6 x 10 –2 (5) 3.9 x 10 3 2. Consider the following equilibrium in a closed system and select the true statement below. C(s) + H 2 O(g) CO(g) + H 2 (g) Δ rxn = +131 kJ (1) decreasing the temperature results in an increase in product formation (2) increasing the pressure results in an increase in product formation (3) increasing the volume results in a decrease in product formation (4) increasing the temperature results in a decrease in Δ rxn which results in more product formation (5) increasing the temperature results in an increase in product formation 3. Ethylene (C 2 H 4 ) is produced by reacting ethanol (CH 3 CH 2 OH) with steam at 600. K: C 2 H 4 (g) + H 2 O(g) CH 3 CH 2 OH(g) K c = 9.0 x 10 3 At equilibrium, the partial pressure of ethanol is 500. atm and the partial pressure of steam is 200. atm. Calculate the partial pressure of ethylene at equilibrium. (1) 2.8 x 10 2 atm (2) 2.2 x 10 –3 atm (3) 4.5 x 10 2 (4) 1.4 x 10 –2 atm (5) 3.0 x 10 2 atm 4. At 2000.ºC, the K c for the following equilibrium is 4.10 x 10 –4 N 2 + O 2 ↔ 2NO(g) What is [NO] when a mixture of 0.20 mol of N

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 01/25/2011 for the course CHM 2046 taught by Professor Veige/martin during the Fall '07 term at University of Florida.

### Page1 / 2

Exam 1 - CHM 2046 Gower/Mitchell Sections Exam 1(Form Code A Spring 2010 Instructions On your scantron sheet enter and bubble in your name UF ID

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online